Radeon RX 6800 XT vs Radeon HD 7770 GHz Edition
We compared two Desktop platform GPUs: 16GB VRAM Radeon RX 6800 XT and 1024MB VRAM Radeon HD 7770 GHz Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
Radeon RX 6800 XT 's Advantages
Released 8 years and 8 months late
Boost Clock2250MHz
More VRAM (16GB vs 1024GB)
Larger VRAM bandwidth (512.0GB/s vs 72.00GB/s)
3968 additional rendering cores
Radeon HD 7770 GHz Edition 's Advantages
Lower TDP (80W vs 300W)
Score
Benchmark
FP32 (float)
Radeon RX 6800 XT
+1520%
20740
Radeon HD 7770 GHz Edition
1280
Graphics Card
Oct 2020
Release Date
Feb 2012
Navi II
Generation
Southern Islands
Desktop
Type
Desktop
PCIe 4.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
1825 MHz
Base Clock
-
2250 MHz
Boost Clock
-
2000 MHz
Memory Clock
1125 MHz
Memory
16GB
Memory Size
1024MB
GDDR6
Memory Type
GDDR5
256bit
Memory Bus
128bit
512.0GB/s
Bandwidth
72.00GB/s
Render Config
72
Compute Units
10
4608
Shading Units
640
288
TMUs
40
128
ROPs
16
72
RT Cores
-
128 KB per Array
L1 Cache
16 KB (per CU)
4 MB
L2 Cache
256 KB
128 MB
L3 Cache
-
Theoretical Performance
288.0 GPixel/s
Pixel Rate
16.00 GPixel/s
648.0 GTexel/s
Texture Rate
40.00 GTexel/s
41.47 TFLOPS
FP16 (half)
-
20.74 TFLOPS
FP32 (float)
1280 GFLOPS
1296 GFLOPS
FP64 (double)
80.00 GFLOPS
Board Design
300W
TDP
80W
700 W
Suggested PSU
250 W
1x HDMI 2.1
2x DisplayPort 1.4a
1x USB Type-C
Outputs
1x DVI
1x HDMI 1.4a
2x mini-DisplayPort 1.2
2x 8-pin
Power Connectors
1x 6-pin
Graphics Processor
Navi 21
GPU Name
Cape Verde
Navi 21 XT
(215-121000177)
GPU Variant
Cape Verde XT
RDNA 2.0
Architecture
GCN 1.0
TSMC
Foundry
TSMC
7 nm
Process Size
28 nm
26.8 billion
Transistors
1.5 billion
520 mm²
Die Size
123 mm²
Graphics Features
12 Ultimate (12_2)
DirectX
12 (11_1)
4.6
OpenGL
4.6
2.1
OpenCL
1.2
1.3
Vulkan
1.2
6.5
Shader Model
5.1
